I. Introduction expansion agent is a low base I produced, high-performance concrete expansion of a small amount of use of a new source of calcium-based expansion, stable performance expansion agent, particle size distribution is more reasonable, its development and expansion properties more marked after the match turn cement hydration system. Mixing cement in concrete expanders 8 to 12%, can compensate for shrinkage of concrete, improve the crack resistance of concrete seepage, making high performance impermeability of waterproof concrete. At the same time also the preparation of high performance concrete expansion agent and self-compacting concrete admixture indispensable. Second, the scope 1. All requirements cracking impermeable concrete projects and components, can be formulated using this shrinkage-compensating concrete, such as: building basements, underground structures, ponds, swimming pools, sewage treatment pond, water towers and storage tanks, subways, tunnels, water conservancy and hydropower , marine and other water structures, rigid waterproof roof, long slabs, stadium bleachers, radiation and concrete structures. 2. The product can also be used to formulate concrete and swelling filled with expansive mortar, such as: beam-column joints, fill joints after pouring concrete, mechanical equipment and reinforcement of secondary perfusion. 3. This product can be used to produce self-stressing concrete pipe under normal use. Third, product technical performance 1. This product is a powder, non-toxic, odorless, non-flammable, non-chlorine salt, no corrosion of steel role. 2. This product is recommended dosage incorporated into the concrete, no significant effect on the performance of fresh concrete. 3. 10% within the mixed mortar water seven days limit expansion to reach 0.030 percent, the indicators meet the "concrete expansion JC476-2001" requirements. 4. 8 to 10 percent of the content can be established in concrete micro-expansion, reduce shrinkage of concrete, when the reinforcement was 0.2 to 1.0%, concrete limit expansion of 0.020 to 0.040%, from 0.2 to 0.7 to establish in concrete MPa from the stress, thereby compensating concrete early hydration heat induced temperature shrinkage and drying shrinkage, improve the impermeability crack resistance of concrete. 5. Expanders did not adversely affect the strength of concrete, but can make more compact microstructure of concrete, to improve the late strength of concrete benefit. 6. Adding the right amount of expansive concrete impermeability grade may be greater than P20. 7. Expansive concrete bonding strength can be increased by 20 to 30%. 8. Sulfate resistance capacity and erosion of the capacity expansion agent concrete can be significantly improved. The use of methods 1. This product is in use, the recommended dosage of 8 to 10 percent, after it was prepared poured joint, after pouring concrete reinforcing band, to be appropriate to increase the dosage. 2. This product can be formulated concrete structural waterproof technology, the building structure and waterproof one, cancel outer waterproof, make the building more simple structure, details refer to "shrinkage-compensating concrete waterproofing method YJGF22-92". 3. concrete can be prepared using this seamless design and construction techniques long reinforced concrete, reduce construction process, so that the construction easier, shorten the construction period. After pouring seam without leaving a large area of ??continuous pouring concrete. Also it is used in ordinary concrete poured joint treatment. Fifth, the construction process requirements and precautions. Now mix batching plant on site or to determine compensation must shrink by concrete mix feeding, metering devices must be accurate, not less expansive doped, or fail to compensate for shrinkage of the requirements, but not over-mixing, or they will have concrete structure damaging effects. 2. Adding expansive concrete mixing time than ordinary concrete extended by 30 seconds, and the disc concrete temperature should be lower than 30 ℃, the free fall distance should be controlled concrete pouring in less than two meters, vibration should be uniform, dense, missed vibration , not less vibration, but vibration. 3. Adding this product before final setting of concrete should pay attention to the secondary hand side, to prevent the surface Shen shrinkage cracks. 4. After pouring concrete mixing expansive conservation is important, should be based on the temperature, and timely water conservation, exposed concrete surface remain moist state, conservation of not less than 14 days; construction of negative temperature concrete into the mold temperature to ensure that more than 5 ℃, immediately after casting with plastic film and insulation material insulation moisture conservation; 5. This product is mixed with concrete pouring finished, basement soon as possible backfill with lime, as soon as possible roofing waterproof layer and insulation. 6. Please follow this manual entirely appropriate "concrete admixture technical specifications GBJ50119-2003" and "shrinkage-compensating concrete waterproofing method YJGF22-92". The related content. VI, packaging, transportation and storage 1. This product is plastic bags, net weight 25kg. 2. Transportation under special sharp objects to prevent scratching, avoid broken package damp, if damp product will fail, no longer be used. 3. If this product more than valid, it can still be used after passing inspection. 4. This product should be stored under dry and ventilated environment, valid for six months, after the first run to open the bag.